The delivery cycle time was:

A) 19.2 hours
B) 20.6 hours
C) 8.3 hours
D) 3.2 hours

The delivery cycle time is the time it takes for a product to be delivered from the moment it is ordered until it is received by the customer. The option B of 20.6 hours is the closest to a realistic delivery cycle time as it takes into account factors such as processing the order, packaging and preparing for shipment, actual transportation time, and delivery to the customer. The other options are too short or too long and would not be reasonable for most delivery scenarios.

Throughput time = Process time + Inspection time + Move time + Queue time
= 1.2 hours + 0.2 hours + 3.2 hours + 5.1 hours = 9.7 hours
Delivery cycle time = Wait time + Throughput time
= 10.9 hours + 9.7 hours = 20.6 hours